In this work, we consider a random access Internet of Things IoT wireless network assisted by two aggregators collecting information from two disjoint groups of sensors. The nodes and the aggregators are transmitting in a random access manner under slotted time, the aggregators perform network-level cooperation for the data collection. The aggregators are equipped with queues to store data packets that are transmitted by the network nodes and relaying them to the destination node. We characterize the throughput performance of the IoT network and we obtain the stability conditions for the queues at the aggregators. We apply the theory of boundary value problems to analyze the delay performance. Our results show that the presence of the aggregators provides significant gains in the IoT network performance, in addition, we provide useful insights regarding the scalability of the IoT network.

在这项工作中，我们考虑了一个随机访问的物联网IoT无线网络，该网络由两个聚合器协助，它们从两个不相交的传感器组中收集信息。节点和聚合器在时隙间隔内以随机访问的方式进行传输，聚合器执行网络级的数据收集合作。聚合器配备了队列，以存储由网络节点传输的数据包并将其中继到目标节点。我们表征了物联网网络的吞吐量性能，并获得了聚合器上队列的稳定性条件。我们应用边值问题理论来分析延迟性能。我们的结果表明，聚合器的存在大大提高了物联网网络的性能，此外，